基于连续潮流的输电网可用输电能力计算

Available transfer capability calculation based on continual power flow for transmission network

提出一种基于连续潮流的线性迭代法计算输电网可用输电能力ATC(AvailableTransferCa鄄pability),详细推导了该算法的数学模型,并给出计算方法及流程,将算法应用到IEEE-30节点系统,结果表明该方法具有一定的实用性、可靠性和有效性。同时,将基于连续潮流法与直流灵敏度法的计算精度进行比较,结果表明该方法精度高;此外讨论了负荷参数λ取固定增长步长与变增长步长两种情况下的计算精度与计算速度,结果表明两者计算精度差不多,但后者计算速度快一些。

A method for calculating ATC(Available Transfer Capability) based on continual power flow iterative linear estimation is presented. A mathematical model of ATC evaluation is formulated and its computing method and flow are described. It has been tested with IEEE30 bus-system and proved practical,reliable and effective. The computation accuracy is compared between the continual power flow method and the DC sensitivity method,which shows the former is better. Furthermore,the computation accuracy and speed are discussed for both fixed and variable augment of load parameter. It is found that the computation accuracy is similar and the speed of variable augment case is faster.